hemihydrate

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hemihydrate

[‚hem·ē′hī‚drate]
(organic chemistry)
A hydrate with a 2:1 molecular ratio of anhydrous compound to water, plaster of paris is the hemihydrate of calcium sulfate, composition CaSO4·½H2O.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

hemihydrate

A hydrate which contains one-half molecule of water to one molecule of the compound; the most common such material is partially dehydrated gypsum (plaster of paris).
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.
References in periodicals archive ?
The complete dissolution of hemihydrate into dehydrate as the plaster were set form series of interlocking of dehydrate crystal matrix (capillaries) giving the plaster the ability to absorb water after it's dry.
In chemical terms the codeine is 7,8-didehydro-4,5alpha-epoxy-3-methoxy-17- methylmorphinan-6-alpha-olphosphate (1:1) (salt) hemihydrates (Fig: 3) [11].